Beryllium iodide

Gas phase thermochemistry data

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Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Quantity Value Units Method Reference Comment
ΔfH°gas40.636kcal/molReviewChase, 1998Data last reviewed in December, 1975
Quantity Value Units Method Reference Comment
S°gas,1 bar56.709cal/mol*KReviewChase, 1998Data last reviewed in December, 1975

Gas Phase Heat Capacity (Shomate Equation)

Cp° = A + B*t + C*t2 + D*t3 + E/t2
H° − H°298.15= A*t + B*t2/2 + C*t3/3 + D*t4/4 − E/t + F − H
S° = A*ln(t) + B*t + C*t2/2 + D*t3/3 − E/(2*t2) + G
    Cp = heat capacity (cal/mol*K)
    H° = standard enthalpy (kcal/mol)
    S° = standard entropy (cal/mol*K)
    t = temperature (K) / 1000.

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Temperature (K) 298. to 6000.
A 8.758141
B 0.300242
C -0.065080
D 0.008778
E -0.077181
F 37.75251
G 66.78719
H 40.63530
ReferenceChase, 1998
Comment Data last reviewed in December, 1975

Constants of diatomic molecules

Go To: Top, Gas phase thermochemistry data, References, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: Klaus P. Huber and Gerhard H. Herzberg

Data collected through September, 1976

Symbols used in the table of constants
SymbolMeaning
State electronic state and / or symmetry symbol
Te minimum electronic energy (cm-1)
ωe vibrational constant – first term (cm-1)
ωexe vibrational constant – second term (cm-1)
ωeye vibrational constant – third term (cm-1)
Be rotational constant in equilibrium position (cm-1)
αe rotational constant – first term (cm-1)
γe rotation-vibration interaction constant (cm-1)
De centrifugal distortion constant (cm-1)
βe rotational constant – first term, centrifugal force (cm-1)
re internuclear distance (Å)
Trans. observed transition(s) corresponding to electronic state
ν00 position of 0-0 band (units noted in table)
Diatomic constants for 9Be127I
StateTeωeωexeωeyeBeαeγeDeβereTrans.ν00
A 2Π3/2     [0.4182]   [0.0000008]  [2.1887] A → X R 23900.83 Z
↳missing citation; Carleer and Colin, 1979
A 2Π1/2 23544.7 603.8 H 2.1  [0.4216] 1   [0.00000073]  [2.1799] A → X R 23540.59 Z
↳missing citation; Carleer and Colin, 1979
X 2Σ+ 0 611.7 H 1.6  [0.4219] 2   [0.00000082]  [2.1791]  

Notes

1Λ-type doubling, Δνfe = +0.0938(J+1/2).
2Spin splitting constant γ0 = +0.0459.

References

Go To: Top, Gas phase thermochemistry data, Constants of diatomic molecules, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Chase, 1998
Chase, M.W., Jr., NIST-JANAF Themochemical Tables, Fourth Edition, J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]

Carleer and Colin, 1979
Carleer; Colin, To be published cited in Huber and Herzberg, 1979, 1979, 82. [all data]

Huber and Herzberg, 1979
Huber, K.P.; Herzberg, G., Molecular Spectra and Molecular Structure. IV. Constants of Diatomic Molecules, Van Nostrand Reinhold Company, New York, 1979, 716. [all data]

Notes

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